Modibodi Basic Mid-Rise Period Brief
Lower concern. MADE SAFE certified, PFAS-free claimed and tested.
Modibodi explicitly markets PFAS-free status with MADE SAFE certification. Organic cotton base with water-resistant treatment avoids legacy PFAS durable finishes.
Brand says: “We are PFAS-free. Our products are certified by MADE SAFE.”
We flunk more products than we pass. This one earned its grade. How we grade
Material
organic cotton blend with water-resistant coating
Brand disclosure
Third-party verified PFAS-free
Lab data
No PFAS found in testing
What’s concerning
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
period care is a category where PFAS exposure is more common.
Water-resistant coating degradation
Non-PFAS synthetic coatings degrade over time with washing and heat exposure. As coating fails, absorbency increases and leak containment weakens, though this is a performance issue rather than a direct toxicological hazard.
Microbial growth and odor with improper care
Extended wear without washing, or storage in damp conditions, can promote bacterial and fungal growth on the absorbent layers, causing odor and irritation. This is a hygiene concern common to all reusable period products, not specific to this brand.
What’s reassuring
Third-party PFAS-free verification
Independently verified PFAS-free by a third party.
No PFAS found in lab test
No PFAS detected in independent testing.
Formaldehyde / VOCs
Organic cotton base and MADE SAFE certification suggest low-formaldehyde finishing processes, but no independent testing results for this specific product are publicly available. Manufacturer documentation would clarify final resin treatments.
Source: ATSDR ↗Azo dyes
No established reports of problematic azo dyes in this product. Organic cotton certification does not guarantee dye safety, but brand transparency and MADE SAFE scope suggest standard, non-hazardous colorants are used.
Sensitization to synthetic coating materials
No documented allergic reactions or skin sensitization reports linked to this product's coating. Individuals with multiple chemical sensitivities should patch-test, though the non-PFAS, MADE SAFE standard reduces the chemical burden compared to conventional alternatives.
The full breakdown
What it's made of and why it matters
This brief combines organic cotton with a water-resistant synthetic coating designed to contain menstrual flow without leaking. The organic cotton reduces pesticide residues compared to conventional cotton, while the coating (non-PFAS, per MADE SAFE certification) replaces older Teflon-family coating technologies that posed PFAS exposure risk. The blend balances absorbency, durability, and breathability, which affects both comfort and microbial growth risk during extended wear.
The brand's record and disclosure
Modibodi holds MADE SAFE certification and has publicly committed to PFAS-free products with third-party testing backing that claim. The brand has been transparent about material composition and sustainability practices, with no established recalls or safety controversies on record for this product line. Their disclosure approach is stronger than many period-care competitors, though certification is limited to PFAS and does not extend to all chemical classes.
How it compares in its category
Period briefs vary widely in material quality; conventional options often use rayon, polyester, or nylon with unspecified coatings that may contain legacy PFAS or other antimicrobials. Modibodi's organic cotton base and certified coating standard this product above many mass-market alternatives. However, some competitors (e.g., Thinx, Knix) also offer PFAS-free options, making this a competitive but not unique choice in the premium segment.
If you buy it
Wash in cool or warm water (not hot, which can degrade coating over time) and air-dry to extend product life. Replace every 1-2 years or if water-resistance noticeably declines, as coating degradation increases leak risk and potential for bacterial colonization. Store in a clean, dry location between uses to minimize moisture buildup. Follow the manufacturer's care label to maintain structural integrity.
What we don’t know
- Basis
- Model estimate, 85% confidence, not a lab result
- Lab test
- Independent test found none
- Brand statement
- Modibodi has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
More period underwear grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.